key date
Crucial calendar entry
A key date is a significant or pivotal date—one that matters more than others in a sequence or timeline.
In numismatics, a key date is a coin from a year with unusually low mintage, making it rare and valuable: The 1909-S VDB is the key date for Lincoln cents.
More broadly, key dates are deadlines or milestones that determine outcomes: Mark the key dates on your calendar.
- milestoneNotable event marking progress
- deadlineTime limit for completion
- anniversaryRecurring memorial date
- landmarkNotable point of reference
- crucialOf supreme importance
pivotal · turning point · calendar · reminder · countdown · appointment · event · memorable · big day · significant · historic · moment · occasion · target · schedule · timestamp · marker · birthday
- timelineera, epoch, period, century, decade
- penny collectingwheat penny, steel penny, copper penny
- coinspennies, leu, silver eagles, nickels, ban
- U.S. coinscent, dime, nickel, penny, quarter